Water tank sealing in Al Sharafiyah Jeddah
Al Sharafiyah is a dense commercial district along King Fahd Road, with apartment buildings rising over ground-floor shops, clinics and office blocks. Tanks here face constant pressure from heavy use and seasonal temperature swings. Rooftop tanks on crowded building tops leak at cracks and floor-wall joints as thermal movement works the seals loose year-round.
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Potable-rated materials
Linings and disinfectants cleared for drinking water tanks, not general-purpose products.
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You get the downtime first
How many hours the tank is out of service, told before we start rather than after we finish.
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A first-draw flush
We run the first draw off after refilling, and the tank is not handed back until the water runs clear.
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Ground and roof tanks
Villas, apartment blocks and premises that need a written record of each visit.
Why the job is different in Al Sharafiyah
The buildings mix older structures from past decades with relatively modern ones, and rooftop tanks face direct sun throughout the year, causing continuous expansion and contraction. The method is set out in full on how we approach Water tank sealing.
Rooftop tanks on crowded building tops
Tall commercial building roofs hold large tanks exposed to sun and strong winds. Summer heat causes tank walls to expand and crack, especially at the floor-wall joint where thermal stress concentrates.
Heavy continuous use and pressure
Shops, clinics and offices consume large volumes of water during long operating hours. Tanks are under constant demand pressure, causing mineral sediment buildup and slow erosion of the protective lining.
Inlet, outlet and pipe joints leak
Tanks in Al Sharafiyah carry multiple pipes for filling, draining and distribution. Thermal movement cracks the seal between pipes and tank shell, causing slow continuous seepage.
The character of Al Sharafiyah
Commercial area: offices, showrooms and small stores
Dense commercial buildings here hold multiple tanks at different levels. Tall buildings with rooftop tanks exposed to direct sun need special treatment because heat and pressure are much higher than in residential quarters.
What we read before any material is opened
A busy commercial district along King Fahd Road east of Al Hamra and Al Ruwais, with tall mixed-use buildings holding King Saud Mosque, the largest in Jeddah, Dr Bakhsh Hospital and the University of Jeddah campus.
Cracking in the wall
Fine cracks on the inner surface first appear on the floor and at corners due to heat-driven expansion and contraction.
The floor to wall joint
The floor-wall joint is critically weak and water seeps continuously from thermal movement during daily cycles.
The condition of the old lining
Inlet, outlet and drain pipes leave gaps around their entries that widen as heat and heavy use stress the seal.
Sediment and scale
Mineral and salt deposits accumulate on the floor and walls from the local water supply, which is mineral-rich.
The pipe entries
The original protective lining is eroded by heat, constant pressure and mineral attack and needs complete replacement.
The hatch and the vent
Water loss from leaks may be invisible but causes continuous waste and rising replacement costs.
How we work
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1
Inspect with the tank empty
We drain it and read the surface dry: whether the water leaves through a crack, a joint or a pipe collar, and what the outer face of the wall and the ceiling below are telling us. A level test with the valves closed separates a leaking tank from leaking pipework.
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2
Clean and prepare the substrate
Sediment out, a high pressure wash, the loose old lining and the weak surface layer of the concrete taken back, then dried. The material grips sound substrate and nothing else.
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3
Make the cracks and joints good
Cracks are chased out and filled with a repair mortar, a cove is formed where the floor meets the wall, and every pipe collar is treated on its own.
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4
Lining, fill test, sterilisation
Successive coats, each run across the one beneath it, on the face the water touches. Then a full cure, a fill with the level watched, and sterilisation with the first fill run to waste before the tank returns to use.
What water tank sealing includes
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Finding where the water leaves
Carried out drained and dry: cracks, joints, pipe collars and the outer face of the wall.
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Draining and sediment removal
The last of the water and the settled layer on the floor come out, because a lining does not stick over sediment.
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Cracks and joints made good
The crack opened and filled, a cove formed at the floor to wall junction, and each pipe entry worked separately.
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Lining coats on the water face
More than one coat, each crossing the one below, in material made for drinking water tanks rather than roof waterproofing.
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Curing, fill test and sterilisation
The material is left to cure, the tank is filled and the level watched, then sterilised and the first fill run to waste. How long the cure takes follows the material and the weather, and we tell you before the date so you can plan around the supply.
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A follow-up level check
We come back once it is in service to read the level and check the outer face, because any remaining loss shows up then rather than on the day of the work.
What is different about Al Sharafiyah Sub-Municipality
The Al Sharafiyah sub municipality runs across central Jeddah from Al Ruwais near the Corniche eastwards through Al Sharafiyah, Al Wurud and Bani Malik to Al Naseem at the Haramain Road. It was among the first areas to grow beyond the old wall, and it is dominated by dense apartment blocks over shops along King Fahd Road and Palestine Street, with old popular quarters, the Bani Malik market, car workshops and storerooms. Ageing buildings, worn drainage and the refuse of restaurants and markets make cockroaches and rodents the most persistent pests, and humidity rises towards the sea.
Questions about this district
Do rooftop tank cracks spread faster here than in other areas?
Yes. Intense heat and heavy use cause constant expansion and contraction. Cracks widen faster on tanks in direct sun.
What causes leaks at the floor-wall joint?
Thermal movement breaks the seal from the lining. Rooftop tanks expand and contract daily, cracking the joint.
Is repairing a small leak enough, or must we seal the whole tank?
A small leak may widen fast. Full sealing is better because fine cracks may exist elsewhere unseen.
Does water for medical clinics need higher cleanliness after sealing?
Yes, especially clinics need very clean water. We sterilise and clean the tank thoroughly after sealing before return to service.
How does sealing differ for rooftop tanks versus basement tanks?
Rooftop tanks need materials that tolerate heat and expansion better. Basement tanks face more ground moisture, needing protection against salt and mineral seepage.
Can the tank be used during sealing work?
No, we empty it completely. We must clean the interior surface of sediment and mineral deposits before sealing begins.
How much does water tank sealing in Al Sharafiyah cost?
It is set after the inspection, because the price follows the type of infestation, the size of the space, how far it has spread and the number of visits it needs. Send a photo and a description on WhatsApp and we will give you an estimate before we reach Al Sharafiyah.
Nearby districts we cover
Other services in Al Sharafiyah
Other services we provide to residents of Al Sharafiyah.
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Water tanks
Water tank cleaning
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Water tanks
Water tank sterilization
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Water tanks
Tank leak repair
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Residential
Cockroach control
Need water tank sealing in Al Sharafiyah? Tell us what you saw and we will tell you what it needs
We reach Al Sharafiyah at a time we agree, and you get the full cost before we start.